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ASTM D3363 Pencil Hardness Tester, WQV 3 in 1 Pencil Hardness Tester Kit with 500/750/1000g Load Weights & 13 Pencils 6B-6H for Paint Coating Film Scratch Test

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  • Pencil hardness tester designed for testing the hardness of coating films, suitable for a variety of industries, including paint and coating, surface finish, plastics and polymers, printing, laboratories, and more
  • Pencil hardness tester kit includes a 500g weight along with two 250g counterweights for 750g and 1000g testing loads; also features a support block and 13 pencils ranging from 6B to 6H hardness
  • All necessary accessories and tools are included in the pencil hardness tester kit for immediate use right out of the package, facilitating a hassle-free setup for users
  • Pencil hardness tester ensures a 45-degree angle to the surface of the tested film, which is critical for accurate hardness testing results (Please always sharpen the pencil tip as instructed)
  • Pencil hardness tester features stainless steel wheels and bearings, providing smooth and flexible operation for consistent testing
  • Each item is well organized in a slotted case, convenient for users to transport and use the kit on the go


HOW TO USE

Step 1. Place the support block on the lower part of the instrument.

Step 2. Use a pencil sharpener to sharpen the pencil until 5-6mm of the graphite core is exposed (do not loosen or damage the core). Hold the pencil at a 90° angle, and grind it on the 400 grit sandpaper until a flat end with sharp edges is achieved (the edges must not have any fractures or chips). After each use, rotate the pencil 180° before using it again, or sharpen it again.

Step 3. Insert the sharpened pencil into the hole of the instrument, ensuring the pencil tip touches the workbench, then tighten the screw and remove the balance weight.

Step 4. Place the instrument on the tested surface and apply force (neither to break the pencil tip nor puncture the coating film). Push it away at a speed of about 1mm/sec over a distance of at least 7mm. Start with the hardest pencil and make five scratches until you find a pencil that does not damage the coating. The hardness of this pencil represents the pencil hardness of the measured coating.

SPECIFICATION

Weight: 500/750/1000g

Pencil Hardness: 6B 5B 4B 3B 2B B HB H 2H 3H 4H 5H 6H

Case Size: 9.65x8.27x2.76 in

Weight: 5.51 lb.

PACKAGE

1 x 500g Weight

2 x 250 Counterweight

1 x Horizontal Support Block

13 x Pencils

2 x Sandpaper

1 x Knife

1 x Rubber

1 x Hard Plastic Case

1 x Instructions